Begna (river)

Begna is a river in Norway, which is formed by the merging of the rivers Otrøelva and Ylja. It is also the name of a village located by the river, with postal code 2937.

The Begna runs from Filefjell in the southern part of Jotunheimen, through Valdres and southward to Hønefoss where the river discharges into the lake Tyrifjorden. The Begna is 213 km long and has a high point of about 1850 meters. The Begna drains a watershed of 4875 km² and is the primary river in this watershed.